Creating the Production Lot Number 
Use
In order to carry out production lot planning, you have to create the production lot and assign the material which is to be planned and produced with this production lot number.
When you create the production lot, the system automatically produces a project definition and a WBS element for the production lot. The WBS element is the number of the production lot.
Prerequisites
You have created a project profile in Customizing for Project System:
Features
When you create the production lot, you maintain the parameters on the control data screen. Among other parameters, you define which type of BOM you would like to use for a production lot:
If you use usually work with the material BOM for all production lots, then when creating the production lot, you only have to enter one production lot number, a project profile in addition to the description and material which you would like to plan with this production lot number.
If you want to create a work breakdown structure BOM for each production lot, when creating the production lot, you only have to enter one production lot number, a project profile in addition to the description and material which you would like to plan with this production lot number.
Activities
To create a production lot, proceed as follows:
The initial screen appears.
The screen for control data appears.
In order to change or display a production lot, starting from the MRP menu, you choose: Master data ® Production lot ® Change or Display.